Online Tool Store
Audio Splitter
Split an uploaded audio file into multiple clips using equal-length parts, manually entered timestamps, or automatic silence detection, then download each clip as a WAV file.
🔒 This tool runs entirely in your browser. Your files are never uploaded to a server.
Load an audio file to begin.
Sample audio — choose your own file to replace it.
How Audio Splitter works
- Choose an audio file — it's decoded locally into raw PCM samples using the Web Audio API's
decodeAudioData. - Pick a split mode: equal parts divides the total duration evenly, manual timestamps cuts at the exact seconds you list, and silence detection scans the waveform for quiet gaps and cuts at their midpoints.
- Click "Split audio" — each resulting segment of the decoded buffer is re-encoded as a standalone 16-bit PCM WAV file, entirely in memory.
- Download each clip individually; nothing is uploaded during decoding, splitting, or export.
How silence detection works
The tool measures the peak amplitude of the waveform in 20-millisecond windows and converts it to decibels relative to full scale (dBFS). Any continuous run of windows quieter than your chosen threshold for at least 300ms is treated as a silent gap, and a split point is placed at its midpoint — the same basic approach used by desktop audio editors' "split on silence" feature, just without the software install.
FAQ
What audio formats can I upload?
Any format your browser can decode natively — WAV, MP3, OGG, and M4A all typically work, since decoding is handled by the Web Audio API rather than a format-specific library.
Why does every clip download as a WAV file?
Encoding compressed formats like MP3 in the browser needs a heavy dedicated encoder library. WAV is uncompressed PCM audio that the browser can write directly from the decoded samples, so every clip — regardless of the format you uploaded — downloads as a lossless .wav file.
How does silence detection decide where to cut?
It scans the waveform in 20ms windows and measures the peak level of each window in dBFS. Any run of windows quieter than your threshold for at least 300ms is treated as a gap, and the tool splits at the midpoint of that gap. Raise the threshold (e.g. from -40 to -30 dBFS) if it is missing quiet-but-present speech, or lower it if it is splitting on background hiss.
How we compare
| Feature | Online Tool Store | Audacity (desktop install) | Upload-based splitter site |
|---|---|---|---|
| No file upload — runs in your browser | ✓ | N/A | ✗ |
| No sign-up required | ✓ | ✓ | ✗ |
| Free, no watermark | ✓ | ✓ | ✗ |
Audacity does far more than splitting, but it means installing desktop software just to cut a clip into parts. Audio Splitter handles the three common splitting patterns — equal, manual, and silence-based — directly in a browser tab, and your file never leaves your device the way it would with an upload-based site.